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// File: ChFi3d.cxx
// Created: Tue Dec 21 16:19:36 1993
// Author: Isabelle GRIGNON
// <isg@sdsun2>
#include <ChFi3d.ixx>
#include <ChFi3d_Builder_0.hxx>
#include <BRepAdaptor_Surface.hxx>
#include <BRepAdaptor_Curve2d.hxx>
#include <BRepAdaptor_Curve.hxx>
#include <BRep_Tool.hxx>
#include <gp_Pnt.hxx>
#include <gp_Vec.hxx>
#include <gp_Pnt2d.hxx>
#include <gp_Vec2d.hxx>
#include <Precision.hxx>
#include <TopExp_Explorer.hxx>
#include <TopoDS.hxx>
//=======================================================================
//function : ConcaveSide
//purpose : calculate the concave face at the neighborhood of the border of
// 2 faces.
//=======================================================================
Standard_Integer ChFi3d::ConcaveSide(const BRepAdaptor_Surface& S1,
const BRepAdaptor_Surface& S2,
const TopoDS_Edge& E,
TopAbs_Orientation& Or1,
TopAbs_Orientation& Or2)
{
Standard_Integer ChoixConge;
Or1 = Or2 = TopAbs_FORWARD;
BRepAdaptor_Curve CE(E);
Standard_Real first = CE.FirstParameter();
Standard_Real last = CE.LastParameter();
Standard_Real par = 0.691254*first + 0.308746*last;
gp_Pnt pt, pt1, pt2; gp_Vec tgE, tgE1, tgE2, ns1, ns2, dint1, dint2;
TopoDS_Face F1 = S1.Face();
TopoDS_Face F2 = S2.Face();
F1.Orientation(TopAbs_FORWARD);
F2.Orientation(TopAbs_FORWARD);
CE.D1(par,pt,tgE);
tgE.Normalize();
tgE2 = tgE1 = tgE;
if(E.Orientation() == TopAbs_REVERSED) tgE.Reverse();
TopoDS_Edge E1 = E, E2 = E;
E1.Orientation(TopAbs_FORWARD);
E2.Orientation(TopAbs_FORWARD);
if(F1.IsSame(F2) && BRep_Tool::IsClosed(E,F1)) {
E2.Orientation(TopAbs_REVERSED);
tgE2.Reverse();
}
else {
TopExp_Explorer Exp;
Standard_Boolean found = 0;
for (Exp.Init(F1,TopAbs_EDGE);
Exp.More() && !found;
Exp.Next()) {
if (E.IsSame(TopoDS::Edge(Exp.Current()))){
if(Exp.Current().Orientation() == TopAbs_REVERSED) tgE1.Reverse();
found = Standard_True;
}
}
if (!found) { return 0; }
found = 0;
for (Exp.Init(F2,TopAbs_EDGE);
Exp.More() && !found;
Exp.Next()) {
if (E.IsSame(TopoDS::Edge(Exp.Current()))){
if(Exp.Current().Orientation() == TopAbs_REVERSED) tgE2.Reverse();
found = Standard_True;
}
}
if (!found) { return 0; }
}
BRepAdaptor_Curve2d pc1(E1,F1);
BRepAdaptor_Curve2d pc2(E2,F2);
gp_Pnt2d p2d1,p2d2;
gp_Vec DU1,DV1,DU2,DV2;
p2d1 = pc1.Value(par);
p2d2 = pc2.Value(par);
S1.D1(p2d1.X(),p2d1.Y(),pt1,DU1,DV1);
ns1 = DU1.Crossed(DV1);
ns1.Normalize();
S2.D1(p2d2.X(),p2d2.Y(),pt2,DU2,DV2);
ns2 = DU2.Crossed(DV2);
ns2.Normalize();
dint1 = ns1.Crossed(tgE1);
dint2 = ns2.Crossed(tgE2);
Standard_Real ang = ns1.CrossMagnitude(ns2);
if(ang > 0.0001*PI){
Standard_Real scal = ns2.Dot(dint1);
if ( scal <= 0. ){
ns2.Reverse();
Or2 = TopAbs_REVERSED;
}
scal = ns1.Dot(dint2);
if ( scal <= 0. ){
ns1.Reverse();
Or1 = TopAbs_REVERSED;
}
}
else {
//the faces are locally tangent - this is fake!
if(dint1.Dot(dint2) < 0.){
//This is a forgotten regularity
gp_Vec DDU, DDV, DDUV;
S1.D2(p2d1.X(),p2d1.Y(),pt1,DU1,DV1,DDU,DDV,DDUV);
DU1 += ( DU1 * dint1 < 0) ? -DDU : DDU;
DV1 += ( DV1 * dint1 < 0) ? -DDV : DDV;
ns1 = DU1.Crossed(DV1);
ns1.Normalize();
S2.D2(p2d2.X(),p2d2.Y(),pt2,DU2,DV2,DDU,DDV,DDUV);
DU2 += ( DU2 * dint2 < 0) ? -DDU : DDU;
DV2 += ( DV2 * dint2 < 0) ? -DDV : DDV;
ns2 = DU2.Crossed(DV2);
ns2.Normalize();
dint1 = ns1.Crossed(tgE1);
dint2 = ns2.Crossed(tgE2);
ang = ns1.CrossMagnitude(ns2);
if(ang > 0.0001*PI){
Standard_Real scal = ns2.Dot(dint1);
if ( scal <= 0. ){
ns2.Reverse();
Or2 = TopAbs_REVERSED;
}
scal = ns1.Dot(dint2);
if ( scal <= 0. ){
ns1.Reverse();
Or1 = TopAbs_REVERSED;
}
}
else {
#ifdef DEB
cout<<"ConcaveSide : no concave face"<<endl;
#endif
//This 10 shows that the face at end is in the extension of one of two base faces
return 10;
}
}
else {
//here it turns back, the points are taken in faces
//neither too close nor too far as much as possible.
Standard_Real u,v;
#ifdef DEB
// Standard_Real deport = 1000*BRep_Tool::Tolerance(E);
#endif
ChFi3d_Coefficient(dint1,DU1,DV1,u,v);
p2d1.SetX(p2d1.X() + u); p2d1.SetY(p2d1.Y() + v);
ChFi3d_Coefficient(dint1,DU2,DV2,u,v);
p2d2.SetX(p2d2.X() + u); p2d2.SetY(p2d2.Y() + v);
S1.D1(p2d1.X(),p2d1.Y(),pt1,DU1,DV1);
ns1 = DU1.Crossed(DV1);
S2.D1(p2d2.X(),p2d2.Y(),pt2,DU2,DV2);
ns2 = DU2.Crossed(DV2);
gp_Vec vref(pt1,pt2);
if(ns1.Dot(vref) < 0.){
Or1 = TopAbs_REVERSED;
}
if(ns2.Dot(vref) > 0.){
Or2 = TopAbs_REVERSED;
}
}
}
if (Or1 == TopAbs_FORWARD) {
if (Or2 == TopAbs_FORWARD) ChoixConge = 1;
else ChoixConge = 7;
}
else {
if (Or2 == TopAbs_FORWARD) ChoixConge = 3;
else ChoixConge = 5;
}
if ((ns1.Crossed(ns2)).Dot(tgE) >= 0.) ChoixConge++ ;
return ChoixConge;
}
//=======================================================================
//function : NextSide
//purpose :
//
//=======================================================================
Standard_Integer ChFi3d::NextSide(TopAbs_Orientation& Or1,
TopAbs_Orientation& Or2,
const TopAbs_Orientation OrSave1,
const TopAbs_Orientation OrSave2,
const Standard_Integer ChoixSave)
{
if (Or1 == TopAbs_FORWARD){Or1 = OrSave1;}
else {
Or1 = TopAbs::Reverse(OrSave1);
}
if (Or2 == TopAbs_FORWARD){Or2 = OrSave2;}
else {
Or2 = TopAbs::Reverse(OrSave2);
}
Standard_Integer ChoixConge;
if (Or1 == TopAbs_FORWARD) {
if (Or2 == TopAbs_FORWARD) ChoixConge = 1;
else {
if(ChoixSave < 0) ChoixConge = 3;
else ChoixConge = 7;
}
}
else {
if (Or2 == TopAbs_FORWARD) {
if(ChoixSave < 0) ChoixConge = 7;
else ChoixConge = 3;
}
else ChoixConge = 5;
}
if (Abs(ChoixSave)%2 == 0) ChoixConge++;
return ChoixConge;
}
//=======================================================================
//function : NextSide
//purpose :
//
//=======================================================================
void ChFi3d::NextSide(TopAbs_Orientation& Or,
const TopAbs_Orientation OrSave,
const TopAbs_Orientation OrFace)
{
if (Or == OrFace){Or = OrSave;}
else {
Or = TopAbs::Reverse(OrSave);
}
}
//=======================================================================
//function : SameSide
//purpose :
//
//=======================================================================
Standard_Boolean ChFi3d::SameSide(const TopAbs_Orientation Or,
const TopAbs_Orientation OrSave1,
const TopAbs_Orientation OrSave2,
const TopAbs_Orientation OrFace1,
const TopAbs_Orientation OrFace2)
{
TopAbs_Orientation o1,o2;
if (Or == OrFace1){o1 = OrSave1;}
else {
o1 = TopAbs::Reverse(OrSave1);
}
if (Or == OrFace2){o2 = OrSave2;}
else {
o2 = TopAbs::Reverse(OrSave2);
}
return (o1 == o2);
}
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